CH311616A - Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). - Google Patents
Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide).Info
- Publication number
- CH311616A CH311616A CH311616DA CH311616A CH 311616 A CH311616 A CH 311616A CH 311616D A CH311616D A CH 311616DA CH 311616 A CH311616 A CH 311616A
- Authority
- CH
- Switzerland
- Prior art keywords
- anilide
- methyl
- halogen
- fatty acid
- production
- Prior art date
Links
Landscapes
- Hydrogenated Pyridines (AREA)
Description
Verfahren zur Herstellung eines neuen basisch substituierten Fettsäure (2-halogen-6-methyl-anilids). Gegenstand des vorliegenden Patentes bil det. ein Verfahren zur Herstellung eines neuen basisch substituierten Fettsäure-(2-halogen-6- methyl-a.nilids), welches dadurch gekennzeich net ist, dass man eine Verbindung der Formel
EMI0001.0004
in welcher X einen reaktionsfähigen, während der Reaktion sich abspaltenden Rest bedeutet, mit Piperidin umsetzt.
Der Rest X kann in einem Halogenatom oder einem sonstigen für den Austausch gegen den Basisehen Rest geeigneten reaktionsfähi gen Substituenten, wie z. B. einer Alky1sul- fonyloxy- oder Arylsulfonyloxygruppe, beste , hen. Der Austausch der Gruppe X gegen den Piperidinrest erfolgt z.
B. durch einfaches Erwärmen mit Piperidin gegebenenfalls in Gegenwart eines basisch reagierenden Konden sationsmittels oder von Piperidin im Über ; schuss. Das N-Piperidin-acet-(2-chlor-6-methyl- anilid) ist ein Öl, das nach einiger Zeit zu farblosen, bei 107-108 schmelzenden Kri stallen erstarrt. Das Hydrochlorid der Base schmilzt bei 172-173 .
Das neue Anilid soll als Lokalanästhetikum und als Zwischenprodukt zur Herstellung wei terer Derivate Verwendung finden. Beispiel: 44 Gewichtsteile Chloracet-(2-chlor-6-me- thylanilid) (gewonnen durch Umsetzen von 2 Chlor-6-methyl-anilin mit Chloracetylchlorid in Gegenwart von Natriumacetat, Schmp. 140 bis 141 ) werden in 80 Gewichtsteilen Äthanol suspendiert und mit 46 Gewichtsteilen Piperi- din versetzt.
Die Temperatur steigt dabei leicht an und ein grosser Teil des Reaktions gemisches geht in Lösung. Nun wird während 4 Stunden bei Zimmertemperatur gerührt und dann einige Stunden bei 65-75 . Eine Probe mit Wasser und nachfolgend mit verdünnter Salzsäure versetzt, ergibt wieder Lösung des ausgefallenen Niederschlages. Mit Wasser dampf wird hierauf der Alkohol und das über schüssige Piperidin abgeblasen und nach dem Erkalten das zurückbleibende Öl in Äther auf genommen. Nach dem Trocknen der ätheri schen Lösung und Verjagen des Lösungsmit tels verbleibt ein Öl, das durch Vakuumdestil lation gereinigt wird.
Man erhält 45 Gewichts teile reines N- Piperidino - acet- (2 - chlor-6-me- thj-anilid'), was einer Ausbeute von 83 /o- ent spricht. Die Umsetzung mit Piperidin kann auch in Benzol stattfinden.
Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). Subject of the present patent bil det. a process for the preparation of a new basic substituted fatty acid (2-halogen-6-methyl-a.nilids), which is characterized in that a compound of the formula
EMI0001.0004
in which X is a reactive radical which is split off during the reaction, is reacted with piperidine.
The radical X can be in a halogen atom or other reactive substituents suitable for replacement with the basic radical, such as. B. an alky1sulfonyloxy or arylsulfonyloxy group, best hen. The exchange of group X against the piperidine residue takes place, for.
B. by simply heating with piperidine, optionally in the presence of a basic condensation agent or piperidine in the over; shot. N-piperidine-acet- (2-chloro-6-methyl-anilide) is an oil that solidifies after a while to form colorless crystals that melt at 107-108. The base hydrochloride melts at 172-173.
The new anilide is to be used as a local anesthetic and as an intermediate for the production of further derivatives. Example: 44 parts by weight of chloroacet- (2-chloro-6-methylanilide) (obtained by reacting 2 chloro-6-methyl-aniline with chloroacetyl chloride in the presence of sodium acetate, melting point 140 to 141) are suspended in 80 parts by weight of ethanol and mixed with 46 parts by weight of piperidine.
The temperature rises slightly and a large part of the reaction mixture goes into solution. The mixture is then stirred for 4 hours at room temperature and then for a few hours at 65-75. A sample with water and then mixed with dilute hydrochloric acid results in a solution of the precipitate again. The alcohol and excess piperidine are then blown off with steam and, after cooling, the remaining oil is taken up in ether. After the ethereal solution has dried and the solvent has been chased away, an oil remains that is cleaned by vacuum distillation.
45 parts by weight of pure N-piperidino-acet- (2-chloro-6-methy-anilide) are obtained, which corresponds to a yield of 83%. The reaction with piperidine can also take place in benzene.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH311616T | 1952-02-25 | ||
CH307799T | 1952-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH311616A true CH311616A (en) | 1955-11-30 |
Family
ID=25735349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH311616D CH311616A (en) | 1952-02-25 | 1952-02-25 | Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH311616A (en) |
-
1952
- 1952-02-25 CH CH311616D patent/CH311616A/en unknown
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